A white page is usually symptom of an old php version (you need at least php 5.4), you should check the server error_log and if you don't get anything send me FTP access to inbox@chevereto.com
If i have a problem on PHP 7.0, i return 5.6 and send my FTP access to you
EDIT 12:34 : I return to 5.6 and re-install all file and now i have Error 500 Internal Server Error (./install) EDIT 12:37 : The problem come from the .htaccess file EDIT 12:47 : I send my FTP access to inbox@chevereto.com